Cemetery notes and/or description:Columbian Harmony Cemetery was a large African-American cemetery on the site of today's Rhode Island Avenue-Brentwood Metro Station. In 1960, 37000 graves were removed to National Harmony Memorial Park Cemetery in nearby Landover, Maryland. The gravestones were discarded and today almost all the graves are unmarked. A plaque near the entrance to the Metro station is all that remains to remind people that there was once a cemetery at that location.